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Article
Open AccessUbiquitous atmospheric production of organic acids mediated by cloud droplets
Atmospheric acidity is increasingly determined by carbon dioxide and organic acids1–3. Among the latter, formic acid facilitates the nucleation of cloud droplets4 and contributes to the acidity of clouds and rain...
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Article
Recent Northern Hemisphere stratospheric HCl increase due to atmospheric circulation changes
Policies have been in place since 1987 to reduce the release of chlorine atoms in the stratosphere, where they deplete ozone; here observations show that since 2007 hydrogen chloride has been increasing in the...